package com.lky.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lky.reggie.exception.CustomExecption;
import com.lky.reggie.mapper.CategoryMapper;
import com.lky.reggie.pojo.Category;
import com.lky.reggie.pojo.Dish;
import com.lky.reggie.pojo.Setmeal;
import com.lky.reggie.service.CategoryService;
import com.lky.reggie.service.DishService;
import com.lky.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author shkstart
 * @Description
 * @date 2023-01-05-12:21
 */
@Slf4j
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;
    /**
     * 根据id删除分类，删除之前需要判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper=new LambdaQueryWrapper<>();
        //添加查询条件，根据分类id进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(dishLambdaQueryWrapper);


        //查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
        if(count>0)
        {
            //已经关联一个菜品，抛一个异常
            throw new CustomExecption("当前分类下关联了菜品，不能删除");

        }

        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper=new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(setmealLambdaQueryWrapper);
        if (count>0)
        {
            //已经关联一个套餐，抛一个异常
            throw new CustomExecption("当前分类下关联了套餐，不能删除");
        }

        //正常删除分类
        super.removeById(id);
    }
}
